body{
    margin: 0px;
}
.pay{
    position: fixed;
    left: 0px;
    top: 0px;
    background: #d2d1d1ba;
    width: 100%;
    height: 100%;
    opacity: 1;
}
.popup{
    position: relative;
    background: #a3d8f1;
    width: 25%;
    height: 55%;
    border-radius: 5px;
    margin: 10% auto;
}
#header{
    height: 40px;
}
#header-right{
    position: absolute;
    width: 25px;
    height: 25px;
    border-radius: 5px;
    background: red;
    color: #fff;
    right: 5px;
    top: 5px;
    text-align: center;
}